CN101115263B - System and method for measuring cell updating frequentness - Google Patents
System and method for measuring cell updating frequentness Download PDFInfo
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- CN101115263B CN101115263B CN2006100889707A CN200610088970A CN101115263B CN 101115263 B CN101115263 B CN 101115263B CN 2006100889707 A CN2006100889707 A CN 2006100889707A CN 200610088970 A CN200610088970 A CN 200610088970A CN 101115263 B CN101115263 B CN 101115263B
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Abstract
The invention relates to a system of testing a frequency-updating of a subdistrict, which is used for moving the user facility with a rapid movement and without the data to send into a Ura PCH state. The system includes: a preplaced module which is used for setting the parameter of the updating frequency state, the parameter of the subdistrict updating times, the parameter of window parameter of the subdistrict updating times and the label parameter of the subdustrict updating times; a writing and updating module which is used for recording system time of the subdistrict updating and parameter of the updating times for the updated subdistrict, and also the number of the smallest updating times; a calculating and dealing module which is used for calculating the existing subdistrict updating frequency which is contrasted with the updating frequency threshold and reset the updating frequency state parameter. By moving the user facility into a Ura PCH state, the frequent subdistrict updating is avoided for the user facility of rapid movement, thereby effectively saving the resources of the systems.
Description
Technical field
The present invention relates to a kind of algorithm of measuring cell updating frequentness of Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access) system (hereinafter to be referred as WCDMA) radio network controller (RNC) network element, for the migration between Cell Pch and the Ura Pch state provides a kind of strategy.
Background technology
In the WCDMA system, subscriber equipment (UE) includes two basic operator schemes: idle pulley and connection mode.Wherein connection mode can further be divided into 4 different states again, and these service conditions have defined the kind of the physical channel of UE use, and these 4 kinds of states are: Cell Dch attitude, Cell Fach attitude, Cell Pch attitude and Ura Pch attitude.Fig. 1 has provided main RRC (RadioResource Control) service condition under connection mode, also provided simultaneously between idle pulley and the connection mode transformational relation and between each state of connection mode inside possible transformational relation.
Under Cell Dch state, RNC (Radio Network Controller) distributes 1 DPCH for UE, and the RNC that serves for UE knows that this UE works under that sub-district or which sub-district.UE is according to carrying out the measure and transmit measurement report from the measuring control information of RNC.
Under Cell Fach state, UE does not take DPCH, uses Random Access Channel (RACH) and forward access channel (FACH) channel to come command transmitting and a spot of user data.Under this state, UE will carry out the sub-district gravity treatment, sends a cell update message to RNC then, so RNC knows the subdistrict position that UE is affiliated.
Under Cell Pch state, service wireless network controller (SRNC, Serving Radio NetworkController) is still known the subdistrict position under the UE, but can only get in touch with UE by paging channel (PCH).Under this state, the power consumption of UE is lower than the power consumption under the Cell Fach state.UE also monitors the system information on BCH (Broadcast Channels) channel simultaneously.Under this state, support the UE of cell broadcaste service also can hear broadcast/multi broadcast control (BMC, Broadcast/MulticastControl) message.If UE carries out the sub-district gravity treatment, it just need be transferred to Cell Fach state automatically and carry out cell update.Then, if do not trigger other actions in cell updating course, it just returns Cell Pch state.
For Ura Pch state, except UE does not carry out the cell update after each sub-district gravity treatment, Ura Pch and Cell Pch are closely similar.But under Ura Pch state, the substitute is UTRAN (the UMTS Terrestrial Radio Access Network) Acceditation Area that UE will read on the broadcast channel indicates, and and if only if after UTRAN Acceditation Area (Ura) change, UE is just with its position informing SRNC.This finishes by the Ura renewal process.A sub-district can belong to one or more Ura, but only when UE can't be in the sub-district the Ura tabulation when finding its up-to-date Ura sign, it just need carry out the Ura renewal process.This " overlapping Ura " characteristic be used for avoiding occurring since continuous base station, geographical position but by the ping-pong that network configuration produced of different RNC control.
The present invention is exactly when being in the transmission of high-speed motion state and free of data as UE, provide a kind of Measurement Algorithm that Ura Pch state is arrived in UE state transition based on cell updating frequentness, to avoid frequent subdistrict updating, because the Ura update frequency is less than cell updating frequentness, to save system resource.
Summary of the invention
The present invention provides a kind of system and method for measuring cell updating frequentness in order to solve above-mentioned technical problem, with Ura Pch state that UE is moved into, saves system resource.
The invention provides a kind of system of measuring cell updating frequentness, the user equipment migration that is used for high-speed motion and free of data are sent is to Ura PCH state, and this system comprises:
Preset module is used to be provided with update frequency state parameter, cell update number of times parameter, cell update number of times window parameter and cell update time tag parameter;
Record and update module, the system time when being used for the recording cell renewal and renewal cell update number of times parameter and cell update time tag parameter;
Compare judge module, be used for the size of comparison sub-district update times parameter and cell update number of times window parameter and minimum update times;
Calculate and processing module, be used to calculate current cell updating frequentness, and compare, according to comparative result replacement update frequency state parameter with the update frequency thresholding.
The invention provides a kind of method of measuring cell updating frequentness, the user equipment migration that is used for high-speed motion and free of data are sent may further comprise the steps to Ura PCH state:
Step 1, update frequency state parameter, cell update number of times parameter, cell update number of times window parameter, cell update time tag parameter are set;
Step 2, when cell update, increase cell update number of times parameter one by one, the system time when writing down each cell update, and current system time composed to cell update time tag parameter;
If it is inferior that step 3 cell update number of times parameter surpasses minimum update times, then execution in step 4, otherwise finish;
Step 4, if cell update number of times parameter is more than or equal to cell update number of times window parameter, the difference of the cell update time tag parameter when the cell update time tag parameter when then equaling cell update number of times window parameter according to cell update number of times window parameter divided by cell update number of times parameter deducts cell update is for the first time calculated current cell updating frequentness, otherwise the difference of the cell update time tag parameter when the cell update time tag parameter during divided by the last cell update deducts cell update is for the first time calculated current cell updating frequentness according to cell update number of times window parameter;
Step 5, compare, the update frequency state parameter is set according to comparative result with current cell updating frequentness and cell updating frequentness thresholding.
(2 * R) calculate cell updating frequentness thresholding in the described step 5, wherein according to CellUpdateFreqThrd=a * V/
The value of k is 0～1, and V is a speed, and R is a radius of society.
In the described step 5,, otherwise the update frequency state parameter is changed to 0 if current cell updating frequentness more than or equal to the cell updating frequentness thresholding, then is changed to 1 with the update frequency state parameter.
Effect of the present invention is to provide Cell Pch and Ura Pch migration strategy, and UE is moved to the UraPch state, for the UE of high-speed motion, thereby has avoided frequent subdistrict updating, can effectively save system resource.
Description of drawings
Fig. 1 is the rrc layer view under UE pattern and the connection mode;
Fig. 2 is an algorithm flow chart.
Embodiment
Enforcement below in conjunction with 2 pairs of technical schemes of accompanying drawing is described in further detail:
Investigation is in the UE behavior of frequent updating cell status, may have following possibility:
1) UE swings back and forth at cell edge
2) UE is in high-speed motion state
For second kind of situation, can set thresholding with high-speed motion state, and can utilize this thresholding to be similar to first kind of situation.
The setting of thresholding should be relevant with above-mentioned UE behavior with cell environment.
If the speed 50km/h of UE is an example with the dense city, radius of society 0.57km if be in the CELL-PCH state or the UE of the PCH state of need moving into, just thinks to be high speed UE.
So, the definition according to movement velocity and update frequency can obtain thresholding:
In the formula
V is a speed, and R is a radius of society, and the value of k is 0～1.
Can calculate current cell updating frequentness by flow chart as shown in Figure 2, wherein the minimum update times of present embodiment is made as 2, and idiographic flow is as follows:
1) parameter 201 is set, comprises: update frequency state variable CellUpdateFreqState, wherein 0 expression is in the low-frequency degree state, and 1 expression is in high frequency state; Cell update number of times CellUpdateNum; Cell update number of times window CellUpdateNumWin; Cell update time tag CellUpdateTimeTab.The setting of update times window is relevant with the network planning, and is under the normal condition, proper with 3～5.
2) during each cell update, CellUpdateNum=CellUpdateNum+1202;
System time when 3) writing down current the renewal composes the system time value to CellUpdateTimeTab203;
4) if CellUpdateNum＞=2204, execution in step 205, otherwise finish;
5) if CellUpdateNum＞=CellUpdateNumWin205 then calculates
6) calculate
Wherein CellUpdateFreq is the current area update frequency, CellUpdateTimeTab[CellSwitchNum] be the system time of sub-district last update, CellUpdateTimeTab[1] be the system time that the sub-district is upgraded for the first time.
If CellUpdateFreq＞=CellUpdateFreqThrd, system is arranged to 1 with parameters C ellUpdateFreqState, think that UE is in sub-district frequent updating state, if meet when UE moved into the PCH state, system detects the CellUpdateFreqState parameter, if be 1, the Ura Pch state of so UE being moved into, otherwise with the UE Cell Pch state of moving into.
Another embodiment of the present invention provides a kind of system of measuring cell updating frequentness, and the user equipment migration that is used for high-speed motion and free of data are sent is characterized in that to Ura PCH state this system comprises:
Preset module is used to be provided with update frequency state parameter, cell update number of times parameter, cell update number of times window parameter and cell update time tag parameter;
Record and update module, the system time when being used for the recording cell renewal and renewal cell update number of times parameter and cell update time tag parameter;
Compare judge module, be used for the size of comparison sub-district update times parameter and cell update number of times window parameter and minimum update times;
Calculate and processing module, be used to calculate current cell updating frequentness, and compare, according to comparative result replacement update frequency state parameter with the update frequency thresholding.
The course of work of present embodiment is identical with a last embodiment, does not repeat them here.
In sum, this method based on the Ura Pch migration algorithm of measuring cell updating frequentness, with the permanent online UE Ura Pch state of moving into, is avoided the frequent subdistrict updating operation by a kind of, upgrades operation with Ura and replacing, and has saved the resource of system.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.
Claims (4)
1. system of measuring cell updating frequentness, the user equipment migration that is used for high-speed motion and free of data are sent is characterized in that to Ura PCH state this system comprises:
Preset module is used to be provided with update frequency state parameter, cell update number of times parameter, cell update number of times window parameter and cell update time tag parameter;
Record and update module, the system time when being used for the recording cell renewal and renewal cell update number of times parameter and cell update time tag parameter;
Compare judge module, the size that is used for comparison sub-district update times parameter and cell update number of times window parameter and minimum update times:, judge further that then whether cell update number of times parameter is more than or equal to cell update number of times window parameter if cell update number of times parameter surpasses minimum update times;
Calculate and processing module, be used for calculating current cell updating frequentness, and compare, according to comparative result replacement update frequency state parameter with the update frequency thresholding according to the comparative result that compares judge module;
Wherein, if cell update number of times parameter is more than or equal to cell update number of times window parameter, the difference of the cell update time tag parameter when then deducting for the first time cell update divided by cell update time tag parameter for upgrading that up-to-date time tag in the window time tag sequence according to cell update number of times window parameter is calculated current cell updating frequentness, otherwise the difference of the cell update time tag parameter when the cell update time tag parameter during divided by the last cell update deducts cell update is for the first time calculated current cell updating frequentness according to cell update number of times parameter.
2. method of measuring cell updating frequentness, the user equipment migration that is used for high-speed motion and free of data are sent is characterized in that to Ura PCH state, may further comprise the steps:
Step 1, update frequency state parameter, cell update number of times parameter, cell update number of times window parameter, cell update time tag parameter are set;
Step increases cell update number of times parameter one by one when cell update, the system time when writing down each cell update, and current system time composed to cell update time tag parameter;
If step 3 cell update number of times parameter surpasses minimum update times, then execution in step 4, otherwise finish;
Step 4, if cell update number of times parameter is more than or equal to cell update number of times window parameter, the difference of the cell update time tag parameter when then deducting for the first time cell update divided by cell update time tag parameter for upgrading that up-to-date time tag in the window time tag sequence according to cell update number of times window parameter is calculated current cell updating frequentness, otherwise the difference of the cell update time tag parameter when the cell update time tag parameter during divided by the last cell update deducts cell update is for the first time calculated current cell updating frequentness according to cell update number of times parameter;
Step 5, compare, the update frequency state parameter is set according to comparative result with current cell updating frequentness and cell updating frequentness thresholding.
3. measurement cell updating frequentness method as claimed in claim 2 is characterized in that, (2 * R) calculate the cell updating frequentness thresholding in the described step 5, wherein according to CellUpdateFreqThrd=α * V/
The value of k is 0～1, and V is a speed, and R is a radius of society.
4. measurement cell updating frequentness method as claimed in claim 2, it is characterized in that, in the described step 5, if current cell updating frequentness is more than or equal to the cell updating frequentness thresholding, then the update frequency state parameter is changed to 1, otherwise the update frequency state parameter is changed to 0.
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| CN101730162B (en) * | 2008-10-29 | 2013-03-20 | 中兴通讯股份有限公司 | Method for reselecting cell |
| CN101902814B (en) * | 2009-05-31 | 2012-10-03 | 电信科学技术研究院 | Method and equipment for processing periodic cell update |
| EP2306764A1 (en) * | 2009-10-02 | 2011-04-06 | Thomson Telecom Belgium | A method for configuring a plurality of parameters in a device |
| US8780744B2 (en) * | 2010-01-25 | 2014-07-15 | Qualcomm Incorporated | Selective allocation of dedicated channel (DCH) resources within a wireless communications system |
| CN102202422B (en) * | 2010-03-22 | 2014-01-01 | 华为技术有限公司 | State transition method and network device |
| CN102300186B (en) * | 2010-06-22 | 2014-02-05 | 电信科学技术研究院 | System information updating method, system information updating indicating method and system information updating indicating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1385046A (en) * | 1999-10-27 | 2002-12-11 | 艾利森电话股份有限公司 | Method for performing cell and URA updates in radio access network |
| CN1756231A (en) * | 2004-09-30 | 2006-04-05 | 华为技术有限公司 | Method for renewing count in multimedia broadcast multicast service system |
| CN1791264A (en) * | 2004-12-14 | 2006-06-21 | 大唐移动通信设备有限公司 | Wireless access network internal resource protecting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385046A (en) * | 1999-10-27 | 2002-12-11 | 艾利森电话股份有限公司 | Method for performing cell and URA updates in radio access network |
| CN1756231A (en) * | 2004-09-30 | 2006-04-05 | 华为技术有限公司 | Method for renewing count in multimedia broadcast multicast service system |
| CN1791264A (en) * | 2004-12-14 | 2006-06-21 | 大唐移动通信设备有限公司 | Wireless access network internal resource protecting method |
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